peter's square are speculating about who will replace pope benedict xvi. some feel the time has come for more diversity in the catholic church. >> perhaps it will be good to have a black pope. >> i'm have south america, from venezuela, and we hope to get a pope from another country. >> i don't think it matters where they're from, as long as they're wel open thelogically to welcoming in as many people into the church as possible. >> reporter: names are surfacing. cardinal peter turkson from ghana, could be the first black pope. cardinal sand ri of argentina is considered the top candidate from latin america. and andrew skoala is considered one of the strongest european candidates. pope benedict is stepping down because the 85-year-old says he no longer has the physical or mental strength to lead. >> reporter: the vatican just disclosed that pope benedict received a pacemaker before he became leader of the catholic church in 2005 and recently, secretly had the battery replaced. >> reporter: there is no word yet when the conclave to elect a new pope will gath